1. Preheat oven to 375 degrees Fahrenheit.
2. On a large cookie sheet, arrange onions, potatoes, artichokes, and lemon slices. Place the chicken pieces on top of the vegetables. Add the olives.
3. Drizzle olive oil and lemon juice over the chicken and vegetables. With a spoon, top the chicken with hummus.
4. Sprinkle, salt, pepper, oregano, and lemon zest all over the pan. Bake in oven for about 30 minutes, until chicken is cooked through. Sprinkle the dish with more fresh oregano. Serve immediately.